Machine operating device



March 27, 1934. G., H. SMITH MACHINE OPERATING DEVICE Filed March 21, 1932 5 Sheets-Sheet l l iL 3 i i m March 27, 1934. H sMlTH 1,953,029

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MACHINE OPERATING DEVICE Filed March 21, 1932 5 Sheets-Sheet 3 a 3 +0-- YFQP 61 I %7 Y 7 6L March 27, 1934. e. H. SMITH 1,953,029 I MACHINE OPERATING DEVICE Filed March 21, 1932 5 Sheets-Sheet 4 1 7 MM [WM March 27, 1934.. G ITH 1,953,029

MACHINE OPERATING DEVICE Filed March 21. 1932 5 Sheets-Sheet 5 w" 1 Y M M7337 oyeKJkuY Patented Mar. 27, 1934 UNITED, STATES PATENT OFFICE 7 Claims.

This invention relates to machinery of the class of machine tools.

The principal objects of the invention are to provide rotary, smoothly operating means for driving one or more shafts or rotary parts on such a machine and means operating therewith for directing a liquid, such as a grinding compound, to the desired position in the machine, and more specifically to provide means for rotating the head stock, means for rotating a grinding wheel or other tool, means for directing a grinding compound against the latter, and means for reversing the direction of travel of the table; to provide a series of hydraulic motors and pumps constructed on the same principle and several of them constructed alike for accomplishing the above mentioned objects; to provide an improved hydraulic or oil motor, and to provide an improved oil pump.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a side view of a machine, shown as a grinding machine, with this invention applied thereto;

Fig. 2 is an elevation of the main pump showing the method of driving it and shown partly in section to illustrate the interior construction;

Figs. 3 and 4 are sectional views respectively on the lines33 and 44 of Fig. 2;

Fig. 5 is a side elevation of a reversible motor for traversing the table;

Fig. 6 is a sectional view of the same on the line 66 of Fig. 5;

Fig. '7 is a diametrical sectional view on the line '77 of Fig. 6;

Figs. 8 and 9 are sectional views on the lines 88 and 9-9 respectively of Fig. 5;

Fig. 10 is a detail sectional view of one of the propellers of this motor;

Fig. 11 is a side view of a couple, consisting of a motor operated by the first named pump and a pump direct connected to the motor for pumping the grinding compound, and

Fig. 12 is a sectional view of that motor on the section line 12--12 of Fig. 11.

Although capable of application to other tools and in fact other machines of various kinds, the invention is shown as applied to a grinding machine, comprising a base 10, having ways at the top and a table 11 operating on the ways. The usual dogs 12 are illustrated. On this table is a headstock 13 which is adapted to be rotated for rotating the work and a dead center or tail stock 14 for supporting the other end of the work. Also mounted on the base 10 is a casing 15 in-which is located mechanism for driving the grinding wheel 16 or other work cutting tool. In this case. this grinding wheel is rotated so that this machine has one motion which a lathe having a nonrotatable tool would not have.

The machine is operated through a shaft 20 by a motor 21, or any other desired source of power, and this shaft 20 constitutes the center of an oil pump mounted in the'casing 22. This oil pump receives the oil from a tank 19 through an intake 23 and delivers it through the outlet into a pipe 24.

The pipe 24 supplies a. header 25 with oil under pressure. From this header extends a pipe 26 which, through a shut-off valve 27, supplies the oil under pressure to a two-way valve 28 through which the oil can be led into two difierent intakes 29 of an oil motor 30 for the purpose of running this motor in either direction as described. The handle of the valve 28 is in the path of the dogs 12 to be operated by them automatically. This motor is connected in any desired way with a pinion for operating the rack with which the table 11 is supplied in the usual way. The motor exhausts into the oil tank 19 through an exhaust pipe 18. 1

Also from the header 25 oil is taken through a pipe 31 to a motor 32 rotating in one direction only. This motor is provided with a central shaft 33 on which is alsoa pump 34. The motor 32 exhausts through a pipe 1'7. This-pump and motor therefore are directly connected and rotate in one direction only, the pump supplying grinding compound or water through a pipe 35 to a nozzle 36 controlled by a valve 3'7 to deliver it on the grinding wheel 16 or on the work as may be desired.

Connected with the pipe 31 is a pipe 40 which delivers oil under pressure to a motor 41 mounted directly on the headstock spindle. The oil is delivered through a stop and start valve 42 operated by a hand lever 43 and provided with a speed regulator 44 of one of the well known kinds. This motor acts to rotate the headstock spindle. This motor is exhausted through a pipe 45 back into the tank.

From the header 25 extends a pipe 46 to a motor 47 which, through gearing or otherwise, drives the spindle of the wheel 16. This motor is supplied through a hand controlled valve 48 and exhausts through a pipe 49. Of course, this motor is not used in case the rest of the invention is applied to a machine having a non-rotary tool.

- aaaaoee Controlled by the same valve 48 is the supply 50 to a motor 51 located at the tailstock end of the machine. This motor is adapted to oscillate the spindle and also to drive a lubrication pump for supplying necessary lubrication to the spindle or slides.

Referring to Figs. 2, 3 and 4 the main pump 22 is shown in detail. The pump involves a rotor consisting of two discs 55 spaced from each other and having between them a central member 56. These three parts are shown as made separately and fixed together and keyed on the shaft 20. They could all be made in one part or in two, if desired. The central part 56 is provided with recesses 57, four being shown. Each recess is provided with two stops 58 at opposite ends of a sector-shapedpartof the recess. Outside each recess also is a fiat segmental wall 59. In the neck of each recess 57 is located a shaft 60 on which is mounted a propeller 61' extending from one disc 55 to the other. Also between the two discs 55 is a stop arm 62 adapted to cooperate with the two surfaces 58 to limit the oscillation of the shaft 60.

It will be seen that the central member 56 does not extend to the substantially cylindrical inner Wall 63 of the cylinder of the pump. On one side is an abutment 64 between the two discs 55 with which the cylindrical surface of the central member 56 engages and against which it fits with a running fit.

It will also be seen that the propellers, one on each shaft, are capable of reaching to the cylindrical wall 63 and running in contact therewith for a purpose which will appear. This construction leaves a space for the oil introduced through the inlet 23 to run in, the purpose being to pump the oil out to the outlet 24 into the header 25.

Outside the discs 55 on the shafts 60 are located two sets of cam arms 65 and 66. The casing 22 of the pump is provided with two stationary cams 67 and 68, one inside and the other outside the cam arms for operating them as the rotor rotates.

Now it will be seen that as this pump isoperated the cam 67 will hold a propeller 61 at the bottom in such position that the space between the central member 66 and the wall 63 will be closed. As

the rotor rotates in the direction of the arrow and that propeller is held positively closed by the cam 67, this propeller will draw in oil from the supply through the intake 23. Until it gets up nearly to the position shown at the top, this propeller will remain in operative position for drawing in the oil. At that time the cam runs off the cam arm 67 and this propeller moves over to inclined position and in fact, is free from any force exerted by the cam so that it will have no present effect at this time. Up to that time the arm 62 has been in contact with the stop surface 58 to hold the propeller in exactly the right position.

At this time the two other propellers are operating to force the oil around and it goes out the outlet 24. Very soon after a propeller reaches the position shown at the top of Fig. 3, its other cam will engage the cam arm 68 and it will be swung down so that the propeller engages the surface 59. The outer surface of the propeller is the same shape as the cylindrical surface 69 of the abutment 64. Therefore the propeller will pass under this abutment as shown in the left side of Fig. 3. Here the arm 62 is against the other stop surface 58. After the rotation has proceded far enough enough to bring the cam arm off the cam 68 at the bottom, the propeller will be free again for an instant and then will come under the influence of the cam 67 again. This is the complete cycle of operations and obviously the pump will constantly deliver oil through the outlet 24 into the header 25.

In Figs. 5 to 10 inclusive the same principle is shown in connection with the double reversible motor 30. The oil coming in through the valve 28 is brought into either one of the inlets 29 and it operates on propellers 61 in this motor to rotate the shaft 70 of that motor in either direction according to the way in which the valve 28 is fixed.

The operation of this motor need not be described in detail but it will be obvious that it can be rotated in either direction according to the position of the valve 28 and will rotate its shaft accordingly. The shaft of this motor operates the table 11, as has been described. In this case the only differences are that the propeller 61 is provided with a packing '71, and that the cams 72 and '73 are located outside and of which there are two pairs here of a little different shape from those shown in the pump 22. r

In Figs. 11 and 12 the relation between the oil motor 32 and the pump 34 for the water or compound to be delivered through the pipe 35 is shown. This motor and pump are both constructed like the pump 22 and their rotors are mounted on the same shaft 75. The outlets of these various motors and pumps all deliver into the original tank. The oil motors 47 and 51 are constructed in the same way and operate in the same way. These motors and pumps are of simple construction and eliminate a great deal of gearing on a machine of this kind. They are nonstalling and can be used on almost any make of machine, whether used for grinding, cutting or other purposes. The installation is simple and the upkeep inexpensive as they are substantially self-lubricating.

Although I have illustrated only one make of machine and motors and pumps of very little difference in structure, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in this respect otherwise than as set forth in the claims, but what I claim is:

1. In a machine of the character described, the combination with a headstock, a tailstock and a tool for operating on the work, of a rotary hydraulic pump, means for operating the pump, a header for receiving the liquid from the pump, a hyrdaulic motor and pump fixed to the same shaft, means for directing liquid from said header to the motor, and means for directing a cutting compound or the like in liquid form from the second pump to the tool.

2. In a machine of the character described, the combination of a headstock, a tailstock, a rotary grinding wheel, a spindle on which the grinding wheel is mounted, a main hydraulic pump, a header from which the pump delivers liquid, a. hydraulic motor connected with said spindle of the wheel for operating it, means for directing the liquid from said header into said motor to operate it, a second hydraulic motor, means for delivering liquid from the header to the second motor, and means for connecting the second motor for lubricating the machine.

3. In a grinding machine, the combination with a rotatable headstock and tailstock, a rotatable grinding wheel for operation 'on the work carried by the headstock and tailstock, a main hydraulic pump for pumping oil, a motor connected with the headstock for rotating the spindle thereof, means for directing oil from the main pump into the motor for operating it, a combined motor and pump direct connected, means for directing a grinding compound from the last named pump to the grinding wheel, and means for directing the oil from the main pump to the last named motor.

4. In a grinding machine, the combination with a reciprocable table, a rotatable headstock andtailstock mounted on the table, a rotatable grinding wheel for operation on the work carried by the headstock and tailstock, a main hydraulic pump for pumping oil, a reversible motor connected with the table for reciprocating it, means for directing oil from said pump into said motor, a motor connected with the headstock for rotating the spindle thereof, means for directing oil from the main pump into the last named motor for operating it, a combined motor and pump direct connected, means fordirecting oil from the main pump'into the last named motor for operating it and its pump, means for directing a grinding compound from the last named pump to the grinding wheel, an oil motor for rotating the grinding wheel, and means for directing the oil from the main pump to the last named motor for rotating the grinding wheel.

5. In a grinding machine, the combination with a reciprocable table, a headstock and tailstock mounted on the table, a rotatable grinding wheel for operation on the work carried by the headstock and tailstock, a main hydraulic pump for pumping oil, a header to which the pump delivers the oil, a reversible motor connected with the table for automatically reciprocating it, means for directing oil from said header into said motor, a combined motor and pump direct connected, means for directing oil from the header into the last named motor for operating it and its pump, means for directing a grinding compound from the last named pump to the grinding wheel for cooling it, an oil motor for rotating the grinding wheel, and means for directing the oil from the header to the last named motor for rotating the grinding wheel.

6. In a grinding machine, the combination with a reciprocable table, a rotatable headstock and tailstock mounted on the table, a rotatable grinding wheel for operation on the work carried by the headstock and tailstock, a main hydraulic pump for pumping oil, a header to which the pump delivers the oil, a reversible motor connected with the table for automatically reciprocating it, means for directing oil from said header into said motor, a motor connected with the headstock for rotating the spindle thereof, means for directing oil from the header into the last named motor for operating it, a combined motor and pump direct connected, means for directing oil from the header into the last named motor for operating it and its pump, means for directing a grinding compound from the last named pump to the grinding wheel for cooling it, an oil motor for rotating the grinding wheel, and means for directing the oil from the header to the last named motor for rotating the grinding wheel.

7. In a machine tool, the combination of a reciprocating table, a shaft, a double motor on the shaft, half of it adapted to rotate in one direction and the other half in the other direction, means for introducing liquid into either half of said motor, means for connecting the shaft with the table for operating it in opposite directions in accordance with the motor that is connected up to be operated.

- GEORGE H. SMITH. 

